Conveners
Parallel: Joint Future/BSM: Live discussion session 1 [Room B]
- Zhen Liu (University of Minnesota)
- Sally Dawson (BNL)
- Luca Cadamuro (University of Florida (US))
- Isobel Ojalvo (Princeton University (US))
- Verena Ingrid Martinez Outschoorn (University of Massachusetts (US))
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
Parallel: Joint Future/BSM: Live discussion session 2 [Room B]
- Caterina Vernieri (SLAC National Accelerator Laboratory (US))
- Isobel Ojalvo (Princeton University (US))
- Luca Cadamuro (University of Florida (US))
- Zhen Liu (University of Minnesota)
- Sally Dawson (BNL)
- Verena Ingrid Martinez Outschoorn (University of Massachusetts (US))
Description
Parallel B ZOOM Meeting: 637 8781 0364
Passcode: [please register to get this info]
Mattermost channel for discussions: https://mattermost.web.cern.ch/higgs2021/channels/joint-futurebsm
A high energy muon collider is an exciting option for exploring the energy frontier beyond the LHC. In addition to having a powerful energy reach, I will discuss how a multi-TeV muon collider also acts as a “vector-boson collider”, allowing for large rates of electroweak processes that can be leveraged for precision measurements of the Higgs sector, via both on- and off-shell measurements. I...
An open question in particle physics is whether the Higgs mechanism generates the masses of all the fermions by the Yukawa interactions. We propose to scrutinize the muon Yukawa coupling at a high-energy muon collider. By the subtle interplay between the muon Yukawa coupling in the high-energy production of multiple (vector and Higgs) bosons, we show that it is possible to measure the muon...
One important class of models of dark matter as a light fermionic weakly interaction massive particle (WIMP) couples the WIMP to a new singlet scalar field that mixes with the Higgs doublet.
The mixing couples the Higgs boson to a new scalar particle called the mediator φ. When the mixing angle is small, the mediator couples to the WIMP without any suppression while the coupling between the...
The THDMa is a new physics model that extends the scalar sector of the Standard Model by an additional doublet as well as a pseudoscalar singlet and allows for mixing between all possible scalar states. In the gauge eigenbasis, the additional pseudoscalar serves as a portal to the dark sector, with a priori any dark matter spin states. The option where dark matter is fermionic is currently one...
The Standard Model prediction for the Higgs boson coupling to the b quark requires as input the running b quark mass evaluated at the scale of m_H. The running is large effect, reducing the prediction for the Yukawa coupling to 60% of the value that would be predicted from the nominal (PDG) value of the b quark mass. In this talk, we will discuss the theory uncertainties in the calculation of...
Thanks to its high luminosity and center of mass energy, the future FCC-hh collider will allow us to probe processes with clean but rare final states that are unaccessible at the LHC. The study of diboson production processes poses a promising way of indirectly constraining New Physics in the context of the Higgs Boson. Specifically, the diphoton leptonic decay channels of the Wh and Zh...
Among the simplest new physics explanations of the muon g-2 anomaly are scenarios with additional contributions mediated by SM gauge or Higgs bosons and new leptons. The leptons can be very heavy, even beyond the reach of future colliders, and thus the confirmation of such explanations might rely only on indirect evidence. This includes modifications of muon couplings to $Z$, $W$ and Higgs...
A multi-TeV muon collider provides a unique environment for future precision Higgs measurements, combining the lower backgrounds of lepton colliders with higher energy reach than achievable at an $e^+e^-$ collider. The large branching fraction of the Higgs boson to jets and lower hadronic backgrounds compared to $pp$ colliders potentially allows the channel to be a clean probe of the Higgs...
An electron-positron Higgs factory is regarded as the highest-priority next large-scale collider facility. Among others, two linear collider projects are being considered: the Compact Linear Collider (CLIC) and the International Linear Collider (ILC). Reaching energies at the TeV scale, both machines would allow us not only to study Higgs boson and top quark properties with very high precision...
In the present work we study the implications at the future $e^+e^-$ colliders of the modified interaction vertices $WWH$, $WWHH$, $HHH$ and $HHHH$ within the context of the non-linear effective field theory given by the Electroweak Chiral Lagrangian. These vertices are given by four parameters, $a$, $b$, $\kappa_3$ and $\kappa_4$, respectively, that are independent and without any constraint...
We investigate semi-invisible Higgs decays $h \to Z X$ (with $X$ an invisible particle) as probes of the possible interactions of the Higgs boson with a dark sector. This possibility can occur in dark matter models with a low-mass pseudoscalar mediator to the dark sector, as well as in models of axion-like particles or dark photons interacting with the Higgs boson. The SM decay $h \to Z\nu\nu$...
The next generation collider, CEPC, will operate at sqrt(s)=240 GeV as the Higgs factory to provide a clean environment for precise measurement of Higgs properties. With the expected integrated luminosity of 5.6 /ab, the CEPC will be able to reach the accuracy for Higgs CP property much better than HL-LHC. Thus the anomalous coupling in the presence of BSM physics can be searched with...
This talk will introduce the full detector simulation analyses of anomalous WWH coupling measurements at the ILC. One method is as same as that at LHC, using differential distributions in H—>WW decay channel. At the ILC essentially all decay channels of WW including the fully hadronic channel can be utilized. Charm-tagging is very useful in order to get more complete differential...
The minimal U$(1)_X$ extension of the Standard Model (SM) is a simple and well-motivated extension of the SM, which supplements the SM with the seesaw mechanism for naturally generating the light neutrino masses and offers various interesting phenomenologies.In the model, the U$(1)_X$ charge of each SM field is characterized by the U$(1)_X$ charge of the SM Higgs doublet with a free parameter...
The problematic huge hierarchy between the usual 4-dimensional Planck mass scale of gravity and the ElectroWeak symmetry breaking scale can interestingly disappear at some point-like location along extra space-like dimensions where the effective gravity scale is reduced down to the TeV scale. Field theories with point-like particle locations (3-dimensional brane-worlds) or point-like...
In this talk, I discuss the discovery potential of nonresonant Higgs pair production through Vector-Boson Fusion (VBF) in electron-proton collisions both at the LHeC and the FCC-he. We suggest a new search strategy that can be used to constrain both the Higgs quartic coupling to massive-vector bosons ($\kappa_{2V}$) and the Higgs triple self-coupling ($\kappa_\lambda$). The expected bounds are...
